From the Curtis-Hixon Hall in Tampa, Florida...The Grateful Dead roll out a fine performance on December 19, 1973. Following their first studio release on their very own record label (now THERE'S a good story unto itself!), and the near completion of their infamous "Wall of Sound" concert sound reinforcement system, the band hit the road to many new parts of the country leaving a wonderful trail of blown minds!
Here's a little info and look at the "Wall of Sound"
http://www.youtube.com/watch?v=nXNLZyS01rY